TSB's

This bulletin applies to 2009-2010 Jeep Commander and Grand Cherokee models equipped with a 3.7L engine and NAG1 automatic transmission. The MIL may be on, with DTC P013A and/or P013C stored.

P013A………….O2 sensor ½ slow response – rich to lean

P013C………….O2 sensor 2/2 slow response – rich to lean

Updating the PCM software will correct this condition.

Using a scan tool (wiTECH) with the appropriate diagnostic procedures available in TechCONNECT, verify that all engine and transmission systems are functioning as designed. If DTCs other than the ones listed here are present, record and repair before proceeding.